1. (v.) When one female prevents another female from scoring on a professional and/or personal level.

2. (v.) Female equivalent of cock block.

Synonyms: Twat swat; clam dam; clam jam (not to be mistaken for rag).
I was just about to close the deal when she cut in, cut me off and clam slammed me so hard I got whiplash. So...I punched her in the vag.
by foschizzlemanizzle June 6, 2010
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Clam Slam is the female version of a “teabag

Primarily used in video games as an insult or to piss people off after a kill or a win.
John: why did you Clam Slam that guy?

Maria: he deserved it, asshole was camping the whole game.
by BigDaddyDagger October 3, 2021
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Picking a Female up by her vagina and brutally slamming her into the ground. Also known as a pussy piledriver.
Sam: Dude your friend was pissing me off, so i had to Clam Slam Her
Jake: Its okay man, Should of thrown a kettle at the bitch
by Motherphuck July 7, 2011
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When Diana killed that sniper, she put down a mean Clam Slam on his forehead.
by K2they October 29, 2014
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When a female is being rude and you want to give her and RKO to her vaginal region.
Thalia was pissing me off so i gave her a Clam Slam.
by Pencilfetus October 29, 2015
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Surprise-thrusting a cunt into the face!
I'd just had a clean shave and shower and was ready to have a lovely night out when a bitch from the hood Clam Slammed my ass and I had to wash the slimey splatter off my face.
by Teddyx February 10, 2009
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